//
// poll.h
//
// Wait for events on set of file descriptors
//
// Copyright (C) 2002 Michael Ringgaard. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright 
//    notice, this list of conditions and the following disclaimer.  
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.  
// 3. Neither the name of the project nor the names of its contributors
//    may be used to endorse or promote products derived from this software
//    without specific prior written permission. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ZHIA IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
// SUCH DAMAGE.
// 

#if _MSC_VER > 1000
#pragma once
#endif

#ifndef SYS_POLL_H
#define SYS_POLL_H

#include <sys/types.h>

#ifndef _POLL_FD_DEFINED
#define _POLL_FD_DEFINED

struct pollfd {
  int fd;                     // File descriptor
  short events;               // Requested events
  short revents;              // Returned events
};

#define POLLIN      0x0001    // Data may be read without blocking
#define POLLPRI     0x0002    // High priority data may be read without blocking
#define POLLOUT     0x0004    // Data may be written without blocking
#define POLLERR     0x0008    // An error has occurred (revents only)
#define POLLHUP     0x0010    // Device has been disconnected (revents only)
#define POLLNVAL    0x0020    // Invalid fd member (revents only)

#endif

#ifdef  __cplusplus
extern "C" {
#endif

osapi int poll(struct pollfd fds[], unsigned int nfds, int timeout);

#ifdef  __cplusplus
}
#endif

#endif
